Authorities are searching for a 10-month-old baby who disappeared after her grandmother was found slain inside a suburban Philadelphia apartment.

Police issued an Amber Alert for Saavni Venna on Monday following the discovery of her grandmother's body at the Marquis Apartments in King of Prussia. Later in the night the girl's father issued a tearful plea for his child's return.

Investigators did not immediately release details on the death of the girl's grandmother, 61-year-old Satyawathi Venna.

Upper Merion Township police said Saavni Venna was last seen between 8 a.m. and 1 p.m. Monday. No information on a suspect or suspects was immediately available.